A new firmware update by Crucial for its M4 series SATA 6 Gb/s SSDs was released last weekend, marked 0009. The new firmware, applicable to Crucial M4 SSD models CT064M4SSD2 (64 GB), CT0128M4SSD2 (128 GB), CT0256M4SSD2 (256 GB), and CT0512M4SSD2 (512 GB), packs a large number of changes. To begin with, the update is said to increase sequential read speeds by 20%. Tests run by SSD Review verify this. PCMark Vantage Disk performance is also increased. The new firmware also works to increase throughput performance, lower write latency, wider compatibility with latest chipsets (AHCI modes), and fixes various kinds of cold-boot failures. The firmware lowers SATA speed negotiation time with host controllers, resulting in faster boot. Depending on the model, the 0009 firmware update for Crucial M4 series SSDs can be downloaded from here.